Electric brush



FIG. 1 is a first perspective view of an electric brush showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines shown in the drawings depict portions of the electric brush that form no part of the claimed design. 

CLAIM The ornamental design for an electric brush, as shown and described. 